You are running a left-tailed 2-sample z-test at the 0.05 level of significance and you find a test statistic of z=-1.87. Shoudl you reject or not reject the null?

Q: You are a research assistant at a zoo. The question of your study is "Has the proportion of baby…

A: Given data: Significance level = 0.05 Claim :  Has the proportion of baby zebras born in zoos…

Q: Test the claim that the proportion of men who own cats is smaller than the proportion of women who…

A: n1=80, n2=20, level of significance ɑ=0.005

Q: You are a research assistant at a zoo.  The question of your study is "Has the proportion of baby…

A: Solution

Q: Can you help me with the p value and test statistic

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Q: You are conducting a study to see if the probability of catching the flu this year is significantly…

A: Given data: Significance level = 0.10 n =121 X = 37 p = 0.2

Q: Please help with part F which I got wrong answers: P-value of the sample statistic rounded to 4…

A: Note:  As per the students requirement solving part(f). From the available information, Sample…

Q: Ho:p = 0.42 H1:p + 0.42 You obtain a sample of sizen = 695 in which there are 311 successes. What is…

A: Any assumption about the parameter or probability function is known as Hypothesis testing. For the…

Q: you have data on smoking status in males (n= 20) and females (n= 15 and want to see if males smoke…

A: We have to determine which statement is true for given situation.Sample sizes n1=20 ,n2=15

Q: esc In a 2013 poll, it was found that 0.78 of Americans cover their mouth when sneezing. A…

A: a)The p-value represents the probability of obtaining results as extreme as the observed results,…

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Q: Video games mindless? "Playing video games not so mindless." This was the headline of a news…

A: As per our guidelines, we are allowed to answer first question only. Thanks   The Explanatory…

Q: CAN SOME HELP ME FIGURE OUT THE ...NULL HYPOTHESIS,ALTERNATIVE HYPOTHESIS, THE TYPE OF TEST…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub parts for…

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A: The concept of testing hypothesis is one of the method of statistical inference where we take the…

Q: Do men and women differ, on average, in terms of the amount of television that they watch each day?…

A: Since here the researcher wanted to determine whether there is a difference in mean number of…

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Q: When is it appropriate to use a one-sample Z test and how is this value similar to a simple z or…

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Q: A random sample of n1 = 292 voters registered in the state of California showed that 143 voted in…

A: From the given information, let X1 be the number of registered voters in the state of California…

Q: # 2. The manager of Apple Green Golf wishes to study the number of rounds of golf played per week…

A: Given, Claim: Test whether there is difference in the number of rounds played by day of the week.…

Q: Can you help me find the p-value for this problem

A: Step 1: Given informationNull Hypothesis: H0​:p=0.78Alternative Hypothesis: H1​:p<0.78Number of…

Q: researcher in your department asks you for some statistical advice (a) She is very concerned about…

A: The hypothesis is an assumption that is being tested.

Q: You wish to test the following claim (Ha) at a significance level of a = 0.01. H.:P1 Ha:P1 7 P2 = P2…

A: Given,n1=200 , p^1=0.36n2=500 , p^2=0.42H0:p1=p2Ha:p1≠p2

Q: There is a common belief that "men marry women who are younger than they are". To test this…

A: We have given the following statement about the hypothesis.

Q: Suppose IQ scores were obtained for 20 randomly selected sets of couples. The 20 pairs of…

A: x¯=96.76 y¯=96 r=0.925 P-value=0.000 and    y^=-10.44+1.1x

Q: An online magazine article reported that US adults spend an average of $50 on birthday gifts for…

A: The smallest level of significance at which the null hypothesis is rejected is given by the p-value.

Q: You are conducting a study to see if the proportion of voters who prefer Candidate A is…

A: Introduction: Denote p as the true proportion of voters who prefer Candidate A. As it is of interest…

Q: You perform a significance test and get a P-value of 0.04.  Which of the following can you conclude?…

A: You perform a significance test and get a P-value of 0.04.  Here we use the P value concept of…

Q: You are conducting a study to see if the probability of catching the flu this year is significantly…

A: The claim is that the probability of catching the flu this year is significantly different from 0.86…

Q: You are a research assistant at a zoo.  The question of your study is "Has the proportion of baby…

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Q: You are testing the difference between a sample mean and a population mean in a one-tailed test that…

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Q: The table below shows the color and the model of cars purchased by 160 randomly selected customers…

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Q: 18% of all college students volunteer their time. Is the percentage of college students who are…

A: The sample size is 313 in which 47 of them volunteered their time.

Q: Provide an example of a research project in your hometown where the one-sample chi-square test would…

A: A chi square test is used to test the comparison between observed and expected results. The main…

Q: Test the claim that the proportion of people who own cats is larger than 30% at the 0.05…

A: Sample size = n =200 Sample proportion = p̂ =  0.32

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A: In this case, the two conditions "low noise and high noise" are dependent on each other. Both…

Q: Q3: A researcher wanted to study the difference between the average achievement of male students and…

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Q: You are conducting a study to see if the proportion of men over 50 who regularly have their prostate…

A: From the provided information, Sample size (n) = 379 Successful observations = 197 Level of…

Q: You are conducting a study to see if the proportion of women over 40 who regularly have mammograms…

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Q: i need to know how to solve this

A: The provided information are:

Q: You are conducting a study to see if the proportion of men over 50 who regularly have their prostate…

A:

Q: You are conducting a study to see if the proportion of women over 40 who regularly have mammograms…

A: Given that  Hypothesized Population Proportion (p_0)(p) = 0.840.84 Favorable Cases (X)(X) =…

Q: True or False?

A: The sign test is a non-parametric test, i.e., the sign test does not assume the distribution of the…

Q: It the​ 1980s, it was generally believed that congenital abnormalities affected about 6​% of a…

A: Hypothesis Testing: It is basically a comparison of the statistical measures of the data with one…